—We're doing a lot to protect our environment, but it is not good enough. —So we should try______ to look after it.

Of all the subjects, chemistry seems to be    for me.

--- You look unhappy. What’s wrong with you?  ---I scored _______points in my class.

This is _______ film I have ever seen.

—Which do you like ________, pears or apples?—Apples.